It looks like the current is running the magnetised rails... the 'gravity boots' have a connector at the bottom for your lead to the pedals. Looks like the magnetised rail doubles as a power supply and means of securing the pedals.

Looks like you could do the same thing by using:
- daisy chain to each pedal
- 9v battery adapter
- 9v lithium battery
?? - depends how much power all the pedals use in an evening
If a standard 9v battery is not enough, then maybe rig up two in parallel?
If still not enough, then would have to make up a rechargeable block using 2 x 18650 or multiples thereof. Charger circuits are all on ebay.
The steel rails are just a replacement for the daisy chain.

Looks like you could do the same thing by using:
- daisy chain to each pedal
- 9v battery adapter
- 9v lithium battery
?? - depends how much power all the pedals use in an evening
If a standard 9v battery is not enough, then maybe rig up two in parallel?
If still not enough, then would have to make up a rechargeable block using 2 x 18650 or multiples thereof. Charger circuits are all on ebay.
The steel rails are just a replacement for the daisy chain.

Maybe there's the idea that you would be able to drop in and pull out pedals depending on the gig you were playing. I dunno... seems like a solution in search of a problem.

Or that. No need to get rare earthy. Having said that I do despise velcro but I'm just not that invested in pedal boards. I could see it being really useful for someone who chops and changes a lot between regular gigs, but honestly those people have several boards made up, and at this price you would break even.